Epoch Timestamp Converter
Convert Unix epoch timestamps to human dates and back — seconds or milliseconds, UTC and local time, with a live clock. Free and 100% client-side.
🔒 100% Client-Side Processing
Your data is processed entirely in your browser and never transmitted to any server.
Common Use Cases
Log investigation
Convert the epoch timestamps in server logs, crash dumps, or audit trails into readable dates to reconstruct when an incident actually happened.
API development
APIs and databases exchange time as Unix seconds or milliseconds — convert a value you got back into local time, or build the timestamp a request body needs.
Debugging timezone bugs
Check what a stored timestamp means in UTC versus your local zone when an event appears at the wrong time in a UI.
Sanity-checking expirations and schedules
Paste a token expiry, cache TTL, or scheduled-run timestamp and read the "in 3 hours" / "2 days ago" line instead of doing the subtraction from the current epoch yourself.
Frequently Asked Questions
- What is a Unix timestamp?
- The number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (the "epoch"). It is timezone-independent, which is why databases, APIs, and logs use it as the canonical representation of a moment in time.
- How does the tool tell seconds from milliseconds?
- By magnitude: 10-digit values (like 1735689600) are treated as seconds, and 13-digit values (like 1735689600000) as milliseconds — the JavaScript Date.now() format. The interpretation used is shown with each result.
- What is the year 2038 problem?
- Systems that store Unix time in a signed 32-bit integer overflow on 19 January 2038 at 03:14:07 UTC, wrapping to 1901. Modern 64-bit systems and JavaScript are unaffected, but embedded devices and legacy databases may still be at risk.
- How do I get the current Unix timestamp?
- This page shows a live, continuously updating clock with the current Unix timestamp — no need to convert "now" by hand. Just open the tool and read the current value directly.
- Is POSIX time the same as Unix time?
- Yes. POSIX time is the formal name for the same definition — seconds since 00:00:00 UTC on 1 January 1970 — used interchangeably with "Unix time" and "epoch time" in specs and documentation.
- How do I convert a Unix timestamp in SQL?
- The function differs by engine: MySQL uses FROM_UNIXTIME(col), PostgreSQL uses TO_TIMESTAMP(col), SQL Server uses DATEADD(SECOND, col, '1970-01-01'), and Snowflake uses TO_TIMESTAMP_NTZ(col). Paste the raw value here first to sanity-check what date it actually represents before writing the query.
- Is there a mobile app for converting timestamps?
- You don't need one — this page works the same on a phone browser as on desktop, with no install, no app permissions, and no ads. Bookmark it or add it to your home screen for one-tap access instead of installing a dedicated app.
- I have a whole column of timestamps to convert, not just one — is there a faster way?
- Yes — Unix Time to Date is built for that: paste an entire list of epoch values, one per line, and get every date back at once. This page is optimized for converting a single value with local time and a live clock.
- Is my data private when I use this tool?
- Yes. This tool runs entirely in your browser using client-side JavaScript — nothing you type is transmitted to, logged by, or stored on any server. You can safely process confidential text, tokens, or code.